Synthesis, characterization and visible light photocatalytic properties of Bi2WO6/rectorite composites

被引：49

作者：

Guo, Yadan ^{[1
]}

Zhang, Gaoke ^{[1
]}

Gan, Huihui ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2012年 / 369卷

基金：

中国国家自然科学基金;

关键词：

Bi2WO6; Rectorite; Bi2WO6/rectorite; 4BS; Photocatalysis; Visible light; Sol-gel method; PULSED-LASER ABLATION; HYDROTHERMAL SYNTHESIS; ORGANIC CONTAMINANTS; NANOSIZED BI2WO6; DEGRADATION; RECTORITE; WATER; NANOCOMPOSITES; NANOPARTICLES; ADSORPTION;

D O I：

10.1016/j.jcis.2011.11.066

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Visible light-induced Bi2WO6/rectorite (BR) composites were prepared by a sol-gel method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectrum, Fourier transform infrared (FUR) spectrum, X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmet-Teller (BET). The UV absorption edges of the BR-450 catalyst showed a marked red shift as compared to that of the pure Bi2WO6. The photocatalytic activities of the as-prepared samples were evaluated by the photocatalytic degradation of 4BS dye in aqueous solution under visible light irradiation (>420 nm). The results showed that the BR-450 catalyst exhibited a strong adsorption capability and a higher photocatalytic degradation activity than the pure Bi2WO6 for 4BS dye, which could be attributed to the synergetic effects of the adsorbability of rectorite and the photocatalytic property of Bi2WO6 in it. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：323 / 329

页数：7

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